From 2004 to 2007, the economy grew about 10% per year, driven largely by an expansion in the garment sector, construction, agriculture, and tourism. GDP dropped to below 7% growth in 2008 and probably contracted in 2009 as a result of the global economic slowdown. With the January 2005 expiration of a WTO Agreement on Textiles and Clothing, Cambodian textile producers were forced to compete directly with lower-priced countries such as China, India, Vietnam, and Bangladesh. The garment industry currently employs more than 280,000 people -about 5% of the work force - and contributes more than 70% of Cambodia's exports. In 2005, exploitable oil deposits were found beneath Cambodia's territorial waters, representing a new revenue stream for the government if commercial extraction begins. Mining also is attracting significant investor interest, particularly in the northern parts of the country. The government has said opportunities exist for mining bauxite, gold, iron and gems. In 2006, a US-Cambodia bilateral Trade and Investment Framework Agreement (TIFA) was signed, and several rounds of discussions have been held since 2007. Rubber exports increased about 25% in 2009 due to rising global demand. The tourism industry has continued to grow rapidly, with foreign arrivals exceeding 2 million per year in 2007-08, however, economic troubles abroad dampened growth in 2009. The global financial crisis is weakening demand for Cambodian exports, and construction is declining due to a shortage of credit. The long-term development of the economy remains a daunting challenge. The Cambodian government is working with bilateral and multilateral donors, including the World Bank and IMF, to address the country's many pressing needs. The major economic challenge for Cambodia over the next decade will be fashioning an economic environment in which the private sector can create enough jobs to handle Cambodia's demographic imbalance. More than 50% of the population is less than 21 years old. The population lacks education and productive skills, particularly in the poverty-ridden countryside, which suffers from an almost total lack of basic infrastructure.